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Geological nchnics lnc. <br /> 1101 7"street <br /> Modesto,CA 95354 _ <br /> 209.522.4119 `` �� 1 11 <br /> 209.522.4227(tax) jR E li � \VTMD <br /> gti@geologicalteGhnics.com <br /> December 02, 2004 <br /> DEC 3 2004 <br /> ENVIRONIVIENI HEALTH <br /> Project No: 425.2 PERMIT/SERVICES <br /> Project Name: George's Service (Durham Ferry) <br /> George and Mei Teranishi <br /> 1600 Durham Ferry Road <br /> Tracy, CA 95376 <br /> RE: Work Plan Addendum describing the Pre Bench Scale/Pilot Testing <br /> Location: George's Service Station, 1600 Durham Ferry Road, Tracy, and CA <br /> Dear Mr. &Mrs. Teranishi, <br /> Geological Technics Inc. is pleased to submit the Work Plan Addendum describing the Bench <br /> Scale Test. Drilling and sample collection process for the Bench Scale Test is described below: <br /> • A borehole will be drilled using 6600 or equivalent direct push Geoprobe about 40 feet deep. <br /> • Soil and water samples will be taken approximately from 10 to12 feet, 20 to 22 feet, 28 to 30 <br /> feet, and 38 to 40 feet (this will cover the Ozone injection target zones). Soil samples will be <br /> collected by continuous core method, and water samples will be collected by grab sample <br /> method. <br /> • All samples will be sent to Excel Chem Labs (certified lab) for analyses as described in the <br /> WPA dated September 22, 2004. <br /> • The borehole will be grouted with neat cement and 4 % bentonite mix. <br /> • The surface will be patched with asphalt. <br /> • Soil cuttings, and decon water will be stored temporarily in 55 gallon DOT approved drums. <br /> • Other scope of the work will be the same as described in WP and WPA(dated August 16, 2004 <br /> and September 22, 2004). <br /> If you have any questions, please contact me at 209-522-4119. <br /> Thank you: <br /> Man�ep Si h <br /> Project Engineer <br /> Cc: Jim Barton—RWQCB <br /> Nuel Henderson—SJC PHS/EDH <br /> 1. ti <br />